Tag Archives: Rising dampness

What is rising dampness?

Rising dampness: Is the upward movement of ground water through permeable building materials by capillary action, the level rising dampness can rise is affected by many factors.

The water rises through a series of inter-connecting pores within the structure by a process termed ‘capillarity suction’ in simple terms a porous masonry acts like a wick.For rising dampness to occur the suction of the wall must be greater than the suction of the ground otherwise water will not rise.

Evaporation will have an effect on the height rising dampness will affect a wall.

Gravity will have an effect on the height rising dampness will affect a wall.

The Porosity of material the wall is constructed from, will have a major effect of the height moisture will rise.

The construction and the thickness of the wall structure, will also have a bearing.